Major revision to Scanner Class

This Scanner implements my new OOP strcture for Arduino robotics.
I've attempted to take this scanner and make it a concrete subclass
of my Abstract Sensor Class.  In the long run this SHOULD..I HOPE...
make it easier to build plug-n-play sensors for my projects.
New Scanner compiles.

Needs testing.
ready for test

This version of the scanner compiles and has the full OOP interface
I'm going for with this mod.  Use with Alfred_whiskers.
Incompatible with older versions of the Alfred code.